A foundation pit support structure and foundation pit support method

Abstract

The present application relates to the technical field of foundation pit support, and in particular to a foundation pit support structure and a foundation pit support method, including a foundation pit, a foundation pit guard plate, a main support plate, a support plate, a support mechanism and a storage mechanism, wherein the inner wall of the foundation pit is provided with a foundation pit guard plate, a side of the foundation pit guard plate away from the inner wall of the foundation pit is connected with the main support plate, and an installation cavity is provided inside the main support plate, the installation cavity of the main support plate is slidably connected with the support plate, and the support mechanism is provided on the support plate, and the arrangement of the support mechanism and the storage mechanism enables the foundation pit support structure to be folded and stored during transportation, thereby reducing its overall volume and making it easy to carry, and at the same time, the support mechanism can be quickly unfolded, and the main support plate and the support plate can be quickly locked through the components in the storage mechanism, and at the same time, the arrangement of structures such as a rotating handle can enable the support mechanism as a whole to be quickly extended, and provide a certain supporting force to the foundation pit guard plate, thereby forming a stable support in the foundation pit.

Description

Technical Field

[0001] The present application relates to the technical field of foundation pit support, and in particular to a foundation pit support structure and a foundation pit support method. Background Art

[0002] Foundation pit support is a measure to support, reinforce and protect the side walls of the foundation pit and the surrounding environment to ensure the safety of underground structure construction and the environment around the foundation pit. When excavating in cities, there are usually various structures such as traffic arteries, existing buildings or pipelines around the foundation pit. In order to protect the safe use of the surrounding structures and avoid foundation pit collapse at the same time, it is necessary to set up a support structure in the foundation pit.

[0003] At present, in most cases, foundation pit support is a temporary measure adopted in the construction of the underground part of the main structure. After the construction of the underground structure is completed, the foundation pit support also completes its function. The construction conditions of the foundation pit project are generally complex and easily affected by environmental and meteorological factors. The construction period should not be too long. Therefore, the validity period of the support design is generally not more than two years, but not less than one year.

[0004] In the related art, since the foundation pit support is a temporary structure, the support generally adopts an assembled structure, which is usually composed of a support plate and a strut plate. However, the current strut plates and support plates are mostly separate structures, which are connected when in use, and the operation is relatively cumbersome. At the same time, since the strut plates need to provide a certain thrust to the support plates when supporting, the strut plates often need to be manually adjusted in their overall length, and corresponding thrust needs to be provided during the adjustment. At this time, external transmission equipment needs to be used, such as electric hydraulic push rods, which further increases the steps of the operation, making the entire installation process more cumbersome and seriously affecting work efficiency. Summary of the invention

[0005] In order to solve the problem that the current support structure is cumbersome to operate during installation, which seriously affects work efficiency, the present application provides a foundation pit support structure and a foundation pit support method.

[0006] In the first aspect, a foundation pit support structure provided by the present application adopts the following technical solution:

[0007] A foundation pit supporting structure, comprising:

[0008] A foundation pit, wherein the inner wall of the foundation pit is provided with a foundation pit guard plate, a side of the foundation pit guard plate away from the inner wall of the foundation pit is connected to a main support plate, and an installation cavity is provided inside the main support plate, and a support plate is slidably connected in the installation cavity of the main support plate;

[0009] A support mechanism, which is used to support the foundation pit guard plate, and the support mechanism is arranged on the support plate, the support mechanism includes a first support rod, a second support rod, a third support rod, a bottom plate and a docking plate, the second support rod is slidably connected in the first support rod, the third support rod is slidably connected in the second support rod, the bottom plate is connected to one end of the first support rod away from the second support rod and is fixed to the bottom of the foundation pit, the docking plate is connected to one end of the third support rod away from the second support rod and is connected to the support plate;

[0010] The storage mechanism is used to store the support mechanism in the installation cavity of the main support plate, and the storage mechanism is arranged on the support plate.

[0011] By adopting the above technical solution, the foundation pit guard plate is supported by the setting of the supporting mechanism, and a certain thrust is provided to the foundation pit guard plate, so that the foundation pit guard plate can be firmly abutted against the inner wall of the foundation pit, thereby avoiding the collapse of the foundation pit and eliminating safety hazards;

[0012] By using the arrangement of the first support rod and the second support rod, the support mechanism as a whole can be quickly pre-adjusted to an appropriate length, so that the bottom plate can quickly abut and be fixed against the foundation pit ground, and at the same time, by using the arrangement of structures such as the rotating handle, the lever can drive the lifting plate to move up and down, and in the process of the lifting plate moving up and down, due to the inclination of the lifting plate, there is friction resistance between the third support rod, thereby driving the third support rod to move inside the second support rod, and by using the arrangement of the check plate, the inclination of the check plate and the friction resistance between the third support rod are utilized to prevent the third support rod from sliding in the opposite direction, so that the staff can quickly and labor-savingly drive the third support rod to move, and provide thrust to the foundation pit guard plate through the support mechanism, which is time-saving and labor-saving while being simple and efficient;

[0013] The storage mechanism is used to enable the entire support mechanism to be stored in the internal cavity of the main support plate during normal transportation, thereby reducing its overall volume. At the same time, due to the integrated structure, the tedious steps of assembling the support mechanism and the foundation pit guard plate during installation are avoided, thereby further improving work efficiency.

[0014] Optionally, the supporting mechanism also includes a supporting bracket, a rotating handle, a lever and a lifting plate, the supporting bracket being fixed on one end of the second supporting rod close to the third supporting rod, and the third supporting rod passes through the supporting bracket and is slidably connected to the supporting bracket, the rotating handle is rotatably connected to one side of the supporting bracket, the lever is arranged at one end of the rotating handle, the lifting plate is slidably mounted on the third supporting rod and is located in the supporting bracket, and one end of the lifting plate is abutted against the supporting bracket, and the lever slidably abuts against the bottom of the other end of the lifting plate.

[0015] By adopting the above technical solution, the rotation of the handle drives the lever to move, and then the lifting plate is moved by the lever, so that the lifting plate is tilted and locked with the third support rod, and the third support rod is driven to slide inside the second support rod simultaneously.

[0016] Optionally, a first reset member is sleeved on the outside of the third support rod, one end of the first reset member abuts against the lifting plate, and the other end abuts against the top of the support bracket.

[0017] By adopting the above technical solution, the lifting plate can be quickly reset by utilizing the elastic force of the first reset member.

[0018] Optionally, the support mechanism further includes a check plate, which is slidably connected to the third support rod and is located below the lifting plate, and one end of the check plate abuts against the bottom of the support bracket.

[0019] By adopting the above technical solution, the third support rod is locked by using the non-return plate to prevent the third support rod from sliding in the opposite direction.

[0020] Optionally, a second reset member is sleeved on the third support rod, the second reset member is located below the first reset member, and one end of the second reset member abuts against the check plate, and the other end abuts against the support bracket.

[0021] By adopting the above technical solution, the check plate can be quickly reset by utilizing the elastic force of the second reset member.

[0022] Optionally, a holding handle is fixed to one side of the support bracket, and the holding handle and the rotating handle are located in the same plane.

[0023] By adopting the above technical solution and utilizing the setting of the gripping handle, it is convenient for the staff to grip and exert force.

[0024] Optionally, the storage mechanism includes a convex plate, an abutment plate, a driven plate and a linkage plate, the convex plate is fixed at the edge of the support plate, one end of the abutment plate is rotatably connected to the convex plate, and the other end is rotatably connected to one end of the driven plate, the other end of the driven plate is rotatably connected to one end of the linkage plate, the center of the linkage plate is rotatably connected to the other convex plate, and the docking plate is fixed to the other end of the linkage plate.

[0025] By adopting the above technical solution, the driven plate is used to drive the abutment plate and the linkage plate to rotate synchronously, so that the support mechanism can be quickly unfolded, locked and stored in the internal cavity of the main support plate.

[0026] Optionally, the storage mechanism further includes a slide groove and a slider, the slide groove is arranged on the support plate, the slider is fixed in the installation cavity of the main support plate near one end of the support plate, and the slider is slidably engaged in the slide groove.

[0027] By adopting the above technical solution, the support plate is limited by the slide groove and the slider to prevent the support plate from slipping out of the main support plate.

[0028] Optionally, a ball head is fixed to one end of the first support rod and the third support rod, and a spherical fixing cavity is provided on the bottom plate and the docking plate, and the ball head is rotatably engaged in the spherical fixing cavity.

[0029] By adopting the above technical solution, the angles of the bottom plate and the docking plate can be universally adjusted by using the ball head.

[0030] In a second aspect, the present application also provides a foundation pit support method, comprising the following steps:

[0031] S1. Select the support unit according to the foundation pit design parameters to ensure that all parts are complete and intact;

[0032] S2. During the site preparation stage, clear the ground debris around the foundation pit and lay the cushion layer to create good conditions for subsequent construction;

[0033] S3. Mark the exact location of each support unit according to the design drawings and make a mark;

[0034] S4. Use a crane or other lifting equipment to lift the support units to the predetermined positions one by one to ensure a smooth landing;

[0035] S5, attach the foundation pit guard plate to the side wall of the foundation pit, then pull the support plate and rotate the support mechanism, thereby driving the linkage plate to rotate, and driving the abutment plate to rotate through the driven plate and abut against one end of the main support plate;

[0036] S6, controlling the second support rod to extend and retract inside the first support rod, so that the first support rod and the second support rod are at an appropriate length as a whole;

[0037] S7. Use the rotating handle to move the lifting plate through the lever when it is turned, thereby driving the third support rod to move inside the second support rod until the bottom plate contacts the foundation pit ground and provides support force.

[0038] By adopting the above technical scheme and using multiple steps to guide the operation, the foundation pit support structure can be folded and stored during transportation, thereby reducing its overall volume and making it easier to carry. At the same time, the support mechanism can be quickly unfolded, and the main support plate and the support plate can be quickly locked through the components in the storage mechanism. At the same time, by using the setting of structures such as the rotating handle, the support mechanism as a whole can be quickly extended, and a certain supporting force can be provided to the foundation pit guard plate, thereby forming a stable support in the foundation pit.

[0039] In summary, the present application includes at least one of the following beneficial technical effects:

[0040] 1. Use the support mechanism to support the foundation pit guard plate and provide a certain thrust to it, so that the foundation pit guard plate can be firmly in contact with the inner wall of the foundation pit, avoiding the collapse of the foundation pit and eliminating safety hazards;

[0041] 2. The first support rod and the second support rod are arranged so that the support mechanism as a whole can be quickly pre-adjusted to an appropriate length, so that the bottom plate can quickly contact and be fixed with the foundation pit ground, and at the same time, the lever can drive the lifting plate to move up and down by means of the arrangement of structures such as the rotating handle, and in the process of the lifting plate moving up and down, due to the inclination of the lifting plate, there is friction resistance between the third support rod, thereby driving the third support rod to move inside the second support rod, and through the arrangement of the check plate, the friction resistance generated between the inclination of the check plate and the third support rod is utilized to prevent the third support rod from sliding in the opposite direction, so that the staff can quickly and labor-savingly drive the third support rod to move, and provide thrust to the foundation pit guard plate through the support mechanism, which is time-saving and labor-saving while being simple and efficient;

[0042] 3. The storage mechanism is used to enable the entire support mechanism to be stored in the internal cavity of the main support plate during normal transportation, thereby reducing its overall volume. At the same time, due to the integrated structure, the cumbersome steps of assembling the support mechanism and the foundation pit guard plate during installation are avoided, thereby further improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the installation structure of a foundation pit support structure and a foundation pit support method in this embodiment.

[0044] Figure 2 It is a schematic diagram of the connection structure between the supporting mechanism and the storage mechanism in this embodiment.

[0045] Figure 3 Schematic diagram of the interior of the main support plate and its connection structure in this embodiment.

[0046] Figure 4 yes Figure 3 Magnified view of area A.

[0047] Figure 5 Schematic diagram of the overall structure of the support mechanism in this embodiment.

[0048] Figure 6 Schematic diagram of the third support rod and its connection structure in this embodiment.

[0049] Figure 7 Schematic diagram of the supporting bracket and its connection structure in this embodiment.

[0050] Description of reference numerals:

[0051] 1. Foundation pit; 2. Foundation pit guard plate; 3. Main support plate; 4. Support plate; 51. First support rod; 52. Second support rod; 53. Third support rod; 54. Bottom plate; 55. Docking plate; 56. Support bracket; 57. Turning handle; 58. Push rod; 59. Lifting plate; 510. First reset member; 511. Check plate; 512. Second reset member; 513. Holding handle; 61. Protruding plate; 62. Abutment plate; 63. Follower plate; 64. Linkage plate; 65. Slide groove; 66. Slider. DETAILED DESCRIPTION

[0052] The following is combined with Figure 1-7 This application is described in further detail.

[0053] The embodiments of the present application disclose a foundation pit support structure and a foundation pit support method.

[0054] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0055] In a first aspect, the present application provides a foundation pit support structure:

[0056] Reference Figure 1 and Figure 2The jacking plate 3 is a kind of jacking plate 4, and the ...

[0057] Reference Figure 3 Specifically, the support mechanism includes a first support rod 51, a second support rod 52, a third support rod 53, a bottom plate 54, a docking plate 55, a support bracket 56, a rotating handle 57, a lever 58, a lifting plate 59, a first reset member 510, a check plate 511 and a second reset member 512. The first support rod 51 and the second support rod 52 are arranged so that the support mechanism as a whole can be quickly pre-adjusted to an appropriate length, so that the bottom plate 54 can be quickly abutted and fixed to the ground of the foundation pit 1. At the same time, the lever 58 can drive the lifting by the arrangement of the rotating handle 57 and other structures. The plate 59 moves up and down, and in the process of the lifting plate 59 moving upward, due to the inclination of the lifting plate 59, there is friction resistance between the lifting plate 59 and the third support rod 53, thereby driving the third support rod 53 to move inside the second support rod 52, and through the setting of the check plate 511, the inclination of the check plate 511 and the friction resistance generated between the third support rod 53 are utilized to prevent the third support rod 53 from sliding in the opposite direction, so that the staff can quickly and labor-savingly drive the third support rod 53 to move, and provide thrust to the foundation pit guard plate 2 through the supporting mechanism, which is time-saving and labor-saving while being simple and efficient.

[0058] Reference Figure 3 and Figure 4In the embodiment of the present application, the second support rod 52 is slidably connected to the first support rod 51, the third support rod 53 is slidably connected to the second support rod 52, the bottom plate 54 is connected to the end of the first support rod 51 away from the second support rod 52, and is fixed to the bottom of the foundation pit 1, the docking plate 55 is connected to the end of the third support rod 53 away from the second support rod 52, and is connected to the support plate 4, the support bracket 56 is fixed to the end of the second support rod 52 close to the third support rod 53, and the third support rod 53 passes through the support bracket 56 and is slidably connected to the support bracket 56, the rotating handle 57 is rotatably connected to one side of the support bracket 56, the lever 58 is arranged at one end of the rotating handle 57, and the lifting plate 59 is slidably sleeved on the third support rod 53, and is located in the supporting bracket 56, and one end of the lifting plate 59 is abutted against the supporting bracket 56, and the lever 58 is slidably abutted against the bottom of the other end of the lifting plate 59, and the third support rod 53 is externally sleeved with a first reset member 510, one end of the first reset member 510 is abutted against the lifting plate 59, and the other end is abutted against the top of the supporting bracket 56, the check plate 511 is slidably connected to the third support rod 53, and is located below the lifting plate 59, and one end of the check plate 511 is abutted against the bottom of the supporting bracket 56, and the third support rod 53 is sleeved with a second reset member 512, the second reset member 512 is located below the first reset member 510, and one end of the second reset member 512 is abutted against the check plate 511, and the other end is abutted against the supporting bracket 56.

[0059] Reference Figure 5 and Figure 6 Specifically, a gripping handle 513 is fixed to one side of the support frame 56, and the gripping handle 513 and the rotating handle 57 are located in the same plane. The setting of the gripping handle 513 makes it convenient for the staff to grip and exert force.

[0060] In the embodiment of the present application, regarding the storage mechanism, the storage mechanism includes a convex plate 61, an abutment plate 62, a driven plate 63 and a linkage plate 64. The setting of the storage mechanism enables the support mechanism as a whole to be stored in the internal cavity of the main support plate 3 during normal transportation, thereby reducing its overall volume. At the same time, due to the integrated structure, the cumbersome steps brought about by the need to assemble the support mechanism and the foundation pit guard plate 2 during installation are avoided, thereby further improving work efficiency.

[0061] The convex plate 61 is fixed at the edge of the support plate 4, one end of the abutment plate 62 is rotatably connected to the convex plate 61, and the other end is rotatably connected to one end of the driven plate 63, the other end of the driven plate 63 is rotatably connected to one end of the linkage plate 64, the center of the linkage plate 64 is rotatably connected to another convex plate 61, and the docking plate 55 is fixed to the other end of the linkage plate 64.

[0062] Specifically, the storage mechanism also includes a slide groove 65 and a slider 66. The slide groove 65 is arranged on the support plate 4. The slider 66 is fixed in the installation cavity of the main support plate 3 at one end close to the support plate 4, and the slider 66 is slidably engaged in the slide groove 65. The slide groove 65 and the slider 66 are used to limit the support plate 4 to prevent the support plate 4 from slipping out of the main support plate 3.

[0063] In the embodiment of the present application, a ball head is fixed at one end of the first support rod 51 and the third support rod 53, and a spherical fixing cavity is provided on the base plate 54 and the docking plate 55. The ball head is rotatably clamped in the spherical fixing cavity, and the angle of the base plate 54 and the docking plate 55 can be universally adjusted by using the ball head.

[0064] Reference Figure 7 It should be noted that in the embodiments of the present application, the reset members are all cylindrical springs. In other embodiments, other forms of reset members are also possible, which are also preferred embodiments of the present application.

[0065] The implementation principle of a foundation pit support structure and a foundation pit support method in the embodiment of the present application is as follows: first, the foundation pit guard plate 2 is abutted against one side of the foundation pit 1, and then the support plate 4 is pulled to slide out from the main support plate 3, and then the support mechanism is rotated as a whole to drive the linkage plate 64 to rotate, thereby making the driven plate 63 linked, and the abutment plate 62 is rotated and abutted against one end of the main support plate 3 through the driven plate 63, thereby locking the main support plate 3 and the support plate 4, and then adjusting the overall length between the first support rod 51 and the second support rod 52 and locking them, so that the bottom plate 54 abuts against the bottom of the foundation pit 1, and then driving the rotating handle 57 to rotate, so that the lever 58 drives the lifting plate 59 to move upward, and when the lifting plate 59 During the upward movement, due to the inclination of the lifting plate 59, there is friction resistance between the third support rod 53, which in turn drives the third support rod 53 to move in the second support rod 52. At this time, the third support rod 53 moves synchronously in the non-return plate 511. After the handle 57 is turned to reset, the lifting plate 59 is reset by the elastic force of the first reset member 510. At the same time, the non-return plate 511 is reset by the elastic force of the second reset member 512. At this time, the non-return plate 511 is tilted and friction resistance is generated between it and the third support rod 53, thereby locking the third support rod 53 to prevent it from sliding in the opposite direction. The reciprocating operation is used to control the movement of the third support rod 53 until the support mechanism forms a stable support.

[0066] Second, refer to Figure 1-Figure 7 The present application also provides a foundation pit support method, comprising the following steps:

[0067] S1. Select the support unit of appropriate specifications according to the foundation pit design parameters and ensure that all parts are complete and intact;

[0068] S2. During the site preparation stage, clear the ground debris around the foundation pit and lay the cushion layer to create good conditions for subsequent construction;

[0069] S3. Mark the exact location of each support unit according to the design drawings and make a mark;

[0070] S4. Use a crane or other lifting equipment to lift the support units to the predetermined positions one by one to ensure a smooth landing;

[0071] S5, attach the foundation pit guard plate 2 to the side wall of the foundation pit 1, then pull the support plate 4, and rotate the support mechanism, thereby driving the linkage plate 64 to rotate, and driving the abutment plate 62 to rotate through the driven plate 63, and abut against one end of the main support plate 3;

[0072] S6, controlling the second support rod 52 to extend and retract inside the first support rod 51, so that the first support rod 51 and the second support rod 52 are at an appropriate length as a whole;

[0073] S7. Use the rotating handle 57 to move the lifting plate 59 through the lever 58, thereby driving the third support rod 53 to move inside the second support rod 52 until the bottom plate 54 abuts against the ground of the foundation pit 1 and provides a certain supporting force.

[0074] The present application utilizes multiple steps to guide the operation, so that the foundation pit support structure can be folded and stored during transportation, thereby reducing its overall volume, making it easier to carry, and at the same time enabling the support mechanism to be quickly unfolded, and the main support plate 3 and the support plate 4 to be quickly locked through the components in the storage mechanism, and at the same time utilizing the setting of structures such as the rotating handle 57 so that the support mechanism as a whole can be quickly extended, and provide a certain supporting force to the foundation pit guard plate 2, thereby forming a stable support in the foundation pit 1.

[0075] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A foundation pit support structure, characterized in that: include: A foundation pit (1), wherein the inner wall of the foundation pit (1) is provided with a foundation pit guard plate (2), a side of the foundation pit guard plate (2) away from the inner wall of the foundation pit (1) is connected to a main support plate (3), and an installation cavity is provided inside the main support plate (3), and a support plate (4) is slidably connected inside the installation cavity of the main support plate (3); A support mechanism, which is used to support the foundation pit guard plate (2), and the support mechanism is arranged on the support plate (4), the support mechanism comprising a first support rod (51), a second support rod (52), a third support rod (53), a bottom plate (54) and a docking plate (55), the second support rod (52) being slidably connected in the first support rod (51), the third support rod (53) being slidably connected in the second support rod (52), the bottom plate (54) being connected to an end of the first support rod (51) away from the second support rod (52) and being fixed to the bottom of the foundation pit (1), and the docking plate (55) being connected to an end of the third support rod (53) away from the second support rod (52) and being connected to the support plate (4); a storage mechanism, used for storing the support mechanism in the installation cavity of the main support plate (3), and the storage mechanism is arranged on the support plate (4); The storage mechanism comprises a convex plate (61), an abutting plate (62), a driven plate (63) and a linkage plate (64); the convex plate (61) is fixed at the edge of the support plate (4); one end of the abutting plate (62) is rotatably connected to the convex plate (61), and the other end is rotatably connected to one end of the driven plate (63); the other end of the driven plate (63) is rotatably connected to one end of the linkage plate (64); the center of the linkage plate (64) is rotatably connected to another convex plate (61); and the docking plate (55) is fixed to the other end of the linkage plate (64); The storage mechanism further comprises a slide groove (65) and a slider (66); the slide groove (65) is arranged on the support plate (4); the slider (66) is fixed in the mounting cavity of the main support plate (3) at one end close to the support plate (4); and the slider (66) is slidably engaged in the slide groove (65).

2. A foundation pit support structure according to claim 1, characterized in that: The support mechanism further comprises a support frame (56), a rotating handle (57), a lever (58) and a lifting plate (59); the support frame (56) is fixed on one end of the second support rod (52) close to the third support rod (53); the third support rod (53) passes through the support frame (56) and is slidably connected to the support frame (56); the rotating handle (57) is rotatably connected to one side of the support frame (56); the lever (58) is arranged at one end of the rotating handle (57); the lifting plate (59) is slidably sleeved on the third support rod (53) and is located in the support frame (56); one end of the lifting plate (59) is in contact with the support frame (56); the lever (58) is slidably in contact with the bottom of the other end of the lifting plate (59).

3. A foundation pit support structure according to claim 2, characterized in that: The third support rod (53) is sleeved with a first reset member (510) on its exterior, one end of the first reset member (510) abuts against the lifting plate (59), and the other end abuts against the top of the support bracket (56).

4. A foundation pit support structure according to claim 3, characterized in that: The support mechanism further comprises a non-return plate (511), the non-return plate (511) being slidably connected to the third support rod (53) and being located below the lifting plate (59), and one end of the non-return plate (511) being in contact with the bottom of the support bracket (56).

5. A foundation pit support structure according to claim 4, characterized in that: A second restoring member (512) is sleeved on the third support rod (53), the second restoring member (512) is located below the first restoring member (510), and one end of the second restoring member (512) abuts against the check plate (511), and the other end abuts against the support bracket (56).

6. A foundation pit support structure according to claim 2, characterized in that: A holding handle (513) is fixed to one side of the support frame (56), and the holding handle (513) and the rotating handle (57) are located in the same plane.

7. The foundation pit support structure according to claim 1, characterized in that: A ball head is fixed to one end of each of the first support rod (51) and the third support rod (53); a spherical fixing cavity is provided on the bottom plate (54) and the docking plate (55); and the ball head is rotatably engaged in the spherical fixing cavity.

8. A foundation pit support method, applied to a foundation pit support structure according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Select the support unit of appropriate specifications according to the foundation pit design parameters to ensure that all parts are complete and intact; S2. During the site preparation stage, clear the ground debris around the foundation pit and lay the cushion layer to create good conditions for subsequent construction; S3. Mark the exact location of each support unit according to the design drawings and make a mark; S4. Use a crane or other lifting equipment to lift the support units to the predetermined positions one by one to ensure a smooth landing; S5, attaching the foundation pit guard plate (2) to the side wall of the foundation pit (1), then pulling the support plate (4) and rotating the support mechanism, thereby driving the linkage plate (64) to rotate, and driving the abutment plate (62) to rotate through the driven plate (63) and abut against one end of the main support plate (3); S6, controlling the second support rod (52) to extend and retract inside the first support rod (51), so that the first support rod (51) and the second support rod (52) are at an appropriate length as a whole; S7. Use the rotating handle (57) to move the lifting plate (59) through the lever (58) when it is rotated, thereby driving the third support rod (53) to move inside the second support rod (52) until the bottom plate (54) abuts against the ground of the foundation pit (1) and provides a certain supporting force.

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